ABC Effect and Resonance Structure in the Double-Pionic Fusion to 3He

E. Perez Del Rio; M. Bashkanov; H. Clement; E. Doroshkevich; A. Pricking; T. Skorodko; G. J. Wagner

doi:10.1051/epjconf/20123709029

ABC Effect and Resonance Structure in the Double-Pionic Fusion to ³He

E. Perez Del Rio, M. Bashkanov, H. Clement, E. Doroshkevich, A. Pricking, T. Skorodko, G. J. Wagner

Physics

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Abstract

Historically the double-pionic fusion to ³He is the reaction, where the ABC effect (low-mass enhancement of the ππ-invariant mass spectrum) was observed for the first time more than 50 years ago. Meanwhile exclusive and kinematically complete high-statistics measurements with WASA at COSY revealed a strict correlation between the ABC effect and a narrow resonance structure with I(J^P) = 0(3⁺) in the total cross section of the most basic double-pionic fusion, the pn → dπ⁰π ⁰ reaction. In order to investigate the situation in the double-pionic fusion to ³He the energy dependence of the ABC effect in the fusion to ³He has been measured by fixed energy measurements of the type pd →³Heππ as well as by quasifree and coherent measurements of the type dd →³He n ππ.

Original language	English
Article number	09029
Journal	EPJ Web of Conferences
Volume	37
DOIs	https://doi.org/10.1051/epjconf/20123709029
Publication status	Published - 1 Dec 2012

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abstract = "Historically the double-pionic fusion to 3He is the reaction, where the ABC effect (low-mass enhancement of the ππ-invariant mass spectrum) was observed for the first time more than 50 years ago. Meanwhile exclusive and kinematically complete high-statistics measurements with WASA at COSY revealed a strict correlation between the ABC effect and a narrow resonance structure with I(JP) = 0(3+) in the total cross section of the most basic double-pionic fusion, the pn → dπ0π 0 reaction. In order to investigate the situation in the double-pionic fusion to 3He the energy dependence of the ABC effect in the fusion to 3He has been measured by fixed energy measurements of the type pd →3Heππ as well as by quasifree and coherent measurements of the type dd →3He n ππ.",

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T1 - ABC Effect and Resonance Structure in the Double-Pionic Fusion to 3He

AU - Perez Del Rio, E.

AU - Bashkanov, M.

AU - Clement, H.

AU - Doroshkevich, E.

AU - Pricking, A.

AU - Skorodko, T.

AU - Wagner, G. J.

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AB - Historically the double-pionic fusion to 3He is the reaction, where the ABC effect (low-mass enhancement of the ππ-invariant mass spectrum) was observed for the first time more than 50 years ago. Meanwhile exclusive and kinematically complete high-statistics measurements with WASA at COSY revealed a strict correlation between the ABC effect and a narrow resonance structure with I(JP) = 0(3+) in the total cross section of the most basic double-pionic fusion, the pn → dπ0π 0 reaction. In order to investigate the situation in the double-pionic fusion to 3He the energy dependence of the ABC effect in the fusion to 3He has been measured by fixed energy measurements of the type pd →3Heππ as well as by quasifree and coherent measurements of the type dd →3He n ππ.

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ABC Effect and Resonance Structure in the Double-Pionic Fusion to 3He

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ABC Effect and Resonance Structure in the Double-Pionic Fusion to ³He